drm/amd/display/dc/dce110/dce110_mem_input_v: Make local functions static

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_mem_input_v.c:471:6: warning: no previous prototype for ‘dce_mem_input_v_is_surface_pending’ [-Wmissing-prototypes]
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_mem_input_v.c:486:6: warning: no previous prototype for ‘dce_mem_input_v_program_surface_flip_and_addr’ [-Wmissing-prototypes]
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_mem_input_v.c:563:6: warning: no previous prototype for ‘dce_mem_input_v_program_pte_vm’ [-Wmissing-prototypes]
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_mem_input_v.c:636:6: warning: no previous prototype for ‘dce_mem_input_v_program_surface_config’ [-Wmissing-prototypes]
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_mem_input_v.c:922:6: warning: no previous prototype for ‘dce_mem_input_v_program_display_marks’ [-Wmissing-prototypes]
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_mem_input_v.c:945:6: warning: no previous prototype for ‘dce_mem_input_program_chroma_display_marks’ [-Wmissing-prototypes]
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_mem_input_v.c:966:6: warning: no previous prototype for ‘dce110_allocate_mem_input_v’ [-Wmissing-prototypes]
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_mem_input_v.c:1008:6: warning: no previous prototype for ‘dce110_free_mem_input_v’ [-Wmissing-prototypes]

Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Leo Li <sunpeng.li@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: amd-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dce110/dce110_mem_input_v.c

@@ -468,7 +468,7 @@ static void program_pixel_format(
 	}
 }
 
-bool dce_mem_input_v_is_surface_pending(struct mem_input *mem_input)
+static bool dce_mem_input_v_is_surface_pending(struct mem_input *mem_input)
 {
 	struct dce_mem_input *mem_input110 = TO_DCE_MEM_INPUT(mem_input);
 	uint32_t value;
@@ -483,7 +483,7 @@ bool dce_mem_input_v_is_surface_pending(struct mem_input *mem_input)
 	return false;
 }
 
-bool dce_mem_input_v_program_surface_flip_and_addr(
+static bool dce_mem_input_v_program_surface_flip_and_addr(
 	struct mem_input *mem_input,
 	const struct dc_plane_address *address,
 	bool flip_immediate)
@@ -560,7 +560,7 @@ static const unsigned int *get_dvmm_hw_setting(
 	}
 }
 
-void dce_mem_input_v_program_pte_vm(
+static void dce_mem_input_v_program_pte_vm(
 		struct mem_input *mem_input,
 		enum surface_pixel_format format,
 		union dc_tiling_info *tiling_info,
@@ -633,7 +633,7 @@ void dce_mem_input_v_program_pte_vm(
 	dm_write_reg(mem_input110->base.ctx, mmUNP_DVMM_PTE_ARB_CONTROL_C, value);
 }
 
-void dce_mem_input_v_program_surface_config(
+static void dce_mem_input_v_program_surface_config(
 	struct mem_input *mem_input,
 	enum surface_pixel_format format,
 	union dc_tiling_info *tiling_info,
@@ -919,7 +919,7 @@ static void program_nbp_watermark_c(
 			marks);
 }
 
-void dce_mem_input_v_program_display_marks(
+static void dce_mem_input_v_program_display_marks(
 	struct mem_input *mem_input,
 	struct dce_watermarks nbp,
 	struct dce_watermarks stutter,
@@ -942,7 +942,7 @@ void dce_mem_input_v_program_display_marks(
 
 }
 
-void dce_mem_input_program_chroma_display_marks(
+static void dce_mem_input_program_chroma_display_marks(
 	struct mem_input *mem_input,
 	struct dce_watermarks nbp,
 	struct dce_watermarks stutter,
@@ -963,7 +963,7 @@ void dce_mem_input_program_chroma_display_marks(
 		stutter);
 }
 
-void dce110_allocate_mem_input_v(
+static void dce110_allocate_mem_input_v(
 	struct mem_input *mi,
 	uint32_t h_total,/* for current stream */
 	uint32_t v_total,/* for current stream */
@@ -1005,7 +1005,7 @@ void dce110_allocate_mem_input_v(
 
 }
 
-void dce110_free_mem_input_v(
+static void dce110_free_mem_input_v(
 	struct mem_input *mi,
 	uint32_t total_stream_num)
 {